package servlet;

import entity.Fruit;
import service.FruitService;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet("/ListServlet")
public class ListServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html; charset=UTF-8");
        FruitService fruit = new FruitService();
        String strPageNo = request.getParameter("pageNo");
        String strPageSize = request.getParameter("pageSize");
        int pageNo = 1;
        int pageSize = 2;

        if (strPageNo!=null){
            pageNo = Integer.parseInt(request.getParameter("pageNo"));
        }
        if (strPageSize!=null){
            pageSize = Integer.parseInt(request.getParameter("pageSize"));
        }

        int pageIndex = (pageNo-1) * pageSize;
        int count = fruit.count();
        int page = count/pageSize;
        if (count%pageSize!=0){
            page+=1;
        }
        List<Fruit> list = fruit.list(pageIndex,pageSize);
        request.setAttribute("page",page);
        request.setAttribute("pageNo",pageNo);
        request.setAttribute("list", list);
        request.getRequestDispatcher("index.jsp").forward(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request,response);
    }
}
